Battery Pack Heat Path Control for Uniform Cell Temperature
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Solution Overview
Problem
Existing battery packs experience temperature variations and electrical output characteristic fluctuations due to differing heat flow paths among battery cells, leading to inefficiencies and potential performance issues.
Innovation Solution
A battery pack design that incorporates a cooling plate extending across the bottom surfaces of battery cells, with insulating blocks positioned between the cooling plate and end plates to direct heat flow along a single path, thereby minimizing temperature variations and electrical output fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple heat flow paths are allowed for battery cells, then heat dissipation efficiency is improved, but temperature variation among battery cells increases
Solution Approach 1:
The cooling plate is segmented into multiple independent cooling channels that are distributed across the bottom surfaces of battery cells. This segmentation allows heat from different battery cells to be dissipated through separate paths, improving overall heat dissipation efficiency while maintaining uniform temperature distribution across all cells.
Solution Approach 2:
The cooling plate is designed with locally optimized thermal conductivity and channel distribution to match the specific heat generation patterns of different battery cell positions. This ensures that each region of the cooling plate provides appropriate cooling capacity, eliminating temperature variations among battery cells while maintaining efficient heat dissipation.
2Temperature
If insulating blocks are added to control heat flow paths, then temperature uniformity is improved, but device complexity increases
Solution Approach 1:
The insulating blocks are integrated into the existing cooling plate structure, combining the functions of heat isolation and structural support into a single component. This merging approach achieves temperature uniformity among battery cells without significantly increasing device complexity, as the insulating blocks are incorporated into the cooling system's existing framework rather than adding separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves uniform temperature distribution and reduced electrical output variations among battery cells, enhancing overall performance and stability.
Implementation Method 1
a cooling plate extending across bottom surfaces of the plurality of battery cells
Implementation Method 2
an insulating block positioned at a coupling position between the end plate and the cooling plate
Data Source
AI summary
A battery pack is capable of providing a uniform temperature environment for a plurality of battery cells to eliminate or alleviate temperature variation depending on positions of the battery cells. The battery pack is also capable of eliminating or alleviating variation in electrical output characteristics due to the temperature variation. The battery pack provides a heat flow along a common first path for battery cells toward a cooling plate extending across bottom surfaces of the battery cells while suppressing heat flow along a second path from a side of the outermost battery cell among the battery cells.